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♦
GM2000 QCI Ultraportable, German Equatorial
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|
RA/DEC Axes |
| Axes Diameters, RA and DEC |
2" (50mm) Diameter, Thick-wall |
| Material |
Alloy Steel (3X stiffness of Aluminum) |
| Bearings |
Multiple Roller Conical, Preloaded |
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|
Worm Gearing |
| Worm Wheel, RA and DEC |
6.8" (172mm) Diameter, 215 Tooth |
| Material |
Bronze B14, aluminum body |
| Worm |
0.95" (24mm) Diameter, Tempered and Ground,
Alloy Steel |
| Backlash Control |
Near-Zero, Spring-loaded Worm (rigidly
supported) |
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|
Motors/Control |
| Motors |
AC Servo Brushless, F.I.S. |
| Power Supply |
24V DC |
| Power Consumption |
0.6A at sidereal rate, 1.7A max |
| Control System |
QCI |
| Guide Speed |
0.5X |
| Go-To Speed |
8°/sec max. |
| Pointing Precision |
3' typical with polar scope setting |
| SW Pointing Precision |
< 30" with internal 10 star mapping |
| Tracking Precision |
±3 to ±4 arcsec, without PEC |
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General |
| Weight |
61 lbs (28 kg), splits into two pieces,
Dec 28lbs (13 kg) and RA 33lbs (15 kg). |
| Capacity |
110 lbs (50 kg) maximum, 90lbs (40 kg)
optimum, without counterweights |
| Latitude Range |
22° -
66°, fine adjustment with altitude knob,
7 point altitude clamping |
| Azimuth Adjustment |
± 10°, fine
adjustable with double screws |
| Counterweight Shaft |
1.6" (40 mm) diameter
stainless steel, 9 lb (4 kg), quick-connect feature. |
| Counterweights |
13 lb (6 kg) and 26 lb (12 kg), nickel
plated steel, no-mar locking |
| Polar Scope |
6x20 8°
illuminated field of view |
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all specifications subject to change
without prior notice
♦
GM4000 QCI Observatory, German Equatorial
♦
|
RA/DEC Axes |
| Axis Diameter, RA |
3.4" (85mm) Diameter, Thick-wall |
| Axis Diameter, DEC |
3.2" (80mm) Diameter, Thick-wall |
| Material |
Alloy Steel (3X stiffness of Aluminum) |
| Bearings |
Multiple Roller Conical, Preloaded, 5.1"
(130 mm) Diameter |
| Through-the-Mount Cabling |
2.4" (60 mm) pass-through holes permit
internal routing of cables for connection to CCD cameras, filter
wheels, electric focusers, etc |
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|
Worm Gearing |
| Worm Wheel, RA |
13" (330mm) Diameter, 430 Tooth |
| Worm Wheel, DEC |
9.6" (244mm) Diameter, 315 Tooth |
| Material |
Bronze B14 |
| Worm |
1.3" (32mm) Diameter, Tempered and Ground,
Alloy Steel |
| Backlash Control |
Near-Zero, Spring-loaded Worm (rigidly
supported) |
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|
|
Motors/Control |
| Motors |
AC Servo Brushless, F.I.S. |
| Power Supply |
24V DC |
| Power Consumption |
1.5 A at sidereal rate, 5 A max |
| Control System |
QCI |
| Guide Speed |
0.5X |
| Go-To Speed |
5°/sec max. |
| Pointing Precision |
< 2' typical, raw |
| SW Pointing Precision |
< 30" with internal 10 star mapping |
| Tracking Precision |
±3 arcsec typical, without PEC |
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|
General |
| Weight |
265 lbs (120 kg) |
| Capacity |
330 lbs (150 kg) maximum, 275lbs (125 kg)
optimum, without counterweights |
| Latitude Range |
23° -
68°, fine adjustment with altitude knob,
7 point altitude clamping |
| Azimuth Adjustment |
± 10°, fine
adjustable with double screws |
| Counterweight Shaft |
2.4" (60 mm) diameter
stainless steel, Length 24" (600mm), 29 lb (13 kg), easy to install
threaded connection. |
| Counterweights |
57 lb (26 kg), 9"
(230mm) diameter nickel plated steel, no-mar
locking. Four Counterweights provided with each GM4000 (228 lbs
total). |
| Polar Scope |
not applicable |
| Overall Height (polar axis at 45°) |
approx. 31.5" (800 mm) |
| Width (diameter of base) |
14.2" (360 mm) -
minimum recommended pier size 14" dia. |
| Length (without counterweight shaft) |
approx. 29.5" (750 mm) |
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all specifications subject to change
without prior notice
last updated 06/15/07
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